diff options
author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2008-04-17 14:35:01 +1000 |
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committer | Paul Mackerras <paulus@samba.org> | 2008-04-18 15:38:47 +1000 |
commit | 945feb174b14e7098cc7ecf0cf4768d35bc52f9c (patch) | |
tree | 9810b2ff0efe8edbfb1506f65834ea0d553e2848 /include/asm-powerpc/rwsem.h | |
parent | fd3e0bbc6052ca9747a5332b382584ece83aab6d (diff) | |
download | op-kernel-dev-945feb174b14e7098cc7ecf0cf4768d35bc52f9c.zip op-kernel-dev-945feb174b14e7098cc7ecf0cf4768d35bc52f9c.tar.gz |
[POWERPC] irqtrace support for 64-bit powerpc
This adds the low level irq tracing hooks to the powerpc architecture
needed to enable full lockdep functionality.
This is partly based on Johannes Berg's initial version. I removed
the asm trampoline that isn't needed (thus improving performance) and
modified all sorts of bits and pieces, reworking most of the assembly,
etc...
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/rwsem.h')
-rw-r--r-- | include/asm-powerpc/rwsem.h | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/include/asm-powerpc/rwsem.h b/include/asm-powerpc/rwsem.h index cefc147..a6cc93b 100644 --- a/include/asm-powerpc/rwsem.h +++ b/include/asm-powerpc/rwsem.h @@ -32,11 +32,20 @@ struct rw_semaphore { #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) spinlock_t wait_lock; struct list_head wait_list; +#ifdef CONFIG_DEBUG_LOCK_ALLOC + struct lockdep_map dep_map; +#endif }; +#ifdef CONFIG_DEBUG_LOCK_ALLOC +# define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname } +#else +# define __RWSEM_DEP_MAP_INIT(lockname) +#endif + #define __RWSEM_INITIALIZER(name) \ - { RWSEM_UNLOCKED_VALUE, SPIN_LOCK_UNLOCKED, \ - LIST_HEAD_INIT((name).wait_list) } + { RWSEM_UNLOCKED_VALUE, __SPIN_LOCK_UNLOCKED((name).wait_lock), \ + LIST_HEAD_INIT((name).wait_list) __RWSEM_DEP_MAP_INIT(name) } #define DECLARE_RWSEM(name) \ struct rw_semaphore name = __RWSEM_INITIALIZER(name) @@ -46,12 +55,15 @@ extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *sem); extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *sem); extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *sem); -static inline void init_rwsem(struct rw_semaphore *sem) -{ - sem->count = RWSEM_UNLOCKED_VALUE; - spin_lock_init(&sem->wait_lock); - INIT_LIST_HEAD(&sem->wait_list); -} +extern void __init_rwsem(struct rw_semaphore *sem, const char *name, + struct lock_class_key *key); + +#define init_rwsem(sem) \ + do { \ + static struct lock_class_key __key; \ + \ + __init_rwsem((sem), #sem, &__key); \ + } while (0) /* * lock for reading @@ -78,7 +90,7 @@ static inline int __down_read_trylock(struct rw_semaphore *sem) /* * lock for writing */ -static inline void __down_write(struct rw_semaphore *sem) +static inline void __down_write_nested(struct rw_semaphore *sem, int subclass) { int tmp; @@ -88,6 +100,11 @@ static inline void __down_write(struct rw_semaphore *sem) rwsem_down_write_failed(sem); } +static inline void __down_write(struct rw_semaphore *sem) +{ + __down_write_nested(sem, 0); +} + static inline int __down_write_trylock(struct rw_semaphore *sem) { int tmp; |